58mm High Definition Wide Angle Macro Lens for Nikon, Canon, Sigma, Tamron, Pentax, Olympus, Rokinon, Sony, Samsung, Zeiss - Ultra Wide Angle Converter, 58 mm Wide Angle Lens, 58mm Lens Pro series .43x Wide Angle Lens Converter WITH MACRO - HD (High Definition) AF - NEW Fits Perfectly On To Lens - No Adapters Required High-Transparency Optical Glass High Quality Aluminum Barrel Look at your lens for the symbol  usually on the front or under the lens cap (under the cap will just be a number) the number next to it is the filter thread size.